Replace your Xtreme Speaker Battery or Keep an Extra Battery on hand as a backup. This kit comes with an extended capacity 5000 mAh, Lithium-Polymer Battery. Compatible with your JBLXtreme Speaker (Xtreme 1st Generation Speaker, Xtreme 1). You get a New, long lasting Battery, Special Tools (necessary for installation), easy to follow Video Instructions and you also get a full One Year Warranty exclusively when you purchase our Battery Replacement Kit compatible with the JBLXtreme Speaker.